Groupon (GRPN) +4.7% premarket after an upgrade to Buy at Piper Jaffray. This comes after...

|By:, SA News Editor

Groupon (GRPN) +4.7% premarket after an upgrade to Buy at Piper Jaffray. This comes after yesterday's 4% slide on news LivingSocial will be around a bit longer thanks to a new funding round.